Boxing Champ Vitali Klitschko Claims Knock Out in Kiev Mayor's Race

(Dan Kitwood/Getty Images)

Vitali Klitschko, former world heavyweight boxing champ, has claimed victory in an election to become the mayor of Kiev.

The giant Klitschko, also known as "Dr. Ironfist," is an ally of candy mogul Petro Poroshenko, who claimed victory in the president's race over the weekend.

Actress Hayden Panettiere is engaged to Klitschko's look-alike brother, Wladmir.

After the brothers cast their votes together over the weekend, Wladimir tweeted a photo of the moment.

If you can't tell who's who, here's a quick guide to the Klitschko brothers. Hint: One is a little bit taller.